Low
H-- on Worcester Bosch Greenstar 9i System ErP

Your boiler is simply indicating that there are currently no routine service reminders or maintenance messages to display.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

No maintenance request messages available.

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Greenstar 12i System System 2 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action is required as this is a normal status message rather than an actual fault.

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All 13 fault codes on the Greenstar 9i System ErP

Seeing a different code? Every code this model can display, in one place.

226235328356360363H03H08H09H12H13H29

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